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Pesticide Safety Education Program (PSEP)
Part of the Pesticide Management Education Program

Conditions of the site also influence leaching of pesticides. The most important condition is depth to groundwater. Less filtering by the soil occurs for a shallow aquifer. Therefore, there is less opportunity for degradation or adsorption. In humid regions where groundwater may be a few feet below the surface of the soil, where rainfall is high, and where soils are permeable, water carrying dissolved pesticides may take only a few days to percolate to groundwater.

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Protecting Groundwater: A Guide for the Pesticide User

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Slide 21 of 63